Cucvrus, I first tried the 2 man method, I started in the rear. It took many, many pumps before any fluid showed. I thought something was wrong. The rear never flowed what I expected. I went to the front and they bled out normally. Since dot 3 and 5 got mixed I went with the cheaper, heavier dot 3. I figured the 3 would push out the lighter 5 out of the system. I bled out the front until the fluid was clear dot 3. The pedal had no resistance until the halfway point where the front brakes become instantly hard. There is no transition point. The rear wheels will spin by hand with the pedal at the hard halfway point and the front brakes lock up hard when the halfway point is reached, also nothing before that point front or rear. I tried bleeding the rear again, but could not get anything but a half teaspoon per pump and it barely flowed out the bleeder. I thought possibly there was still air in the rear but the front would not let the pedal travel so I hooked up the mity vac and vacuumed out a half quart each side, had clear fluid each side, with no change, still a soft pedal and I can turn the brake drum by hand. So now I cracked the line at the MC. The rear yields the same volume I got at the rear bleeder. The front provides nothing until the halfway point where the pedal is hard and at that point fluid flows very strong like I would expect. I think this MC is bad, but I'm asking here because this is already the 3rd MC i picked up from napa. The first was wrong, the second was closer except the reservoirs were reversed, so I delivered the original and got this one by sight matching. I just bought the mity vac and it works very well, clean and easy, I will use that every time from now on.
Rustystud, because I get next to nothing from the MC small reservoir that provides the rear brakes at the MC, I would say that takes the proportioning valve out of the equation. Do you concur? I did not know about the reset button but I have set brakes by locking them up before. That info and where it is located is good to know. You seem knowledgeable on other vehicles and I have a question about my 1956 International. The rear brake shoes were saturated with brake fluid and had leaking seals. I cleaned them as best as I could knowing they would be grabby. I use the truck only for hauling firewood so I thought I could live with some grabbyness as the shoes had no wear and I was low on cash. I needed the truck badly for a haul out and I thought the brakes might grab when empty and they do, but when the truck is loaded is where I found the surprise. There is no feel, they grab instantly with the lightest pedal. When empty I have a little feel. The S160 is a 2.5 ton truck with duels. Can you explain what is going on here? as it isn't making sense to me. All I know is I made a big mistake by not getting new shoes.
Thanks to all!
